Coating for halogen lamps

Details Coating for halogen lamps Coating for halogen lamps

C - Chemistry, Metallurgy

03

C

6/226, 117/229

C03C 17/23 (2006.01) C03C 17/04 (2006.01) H01K 1/32 (2006.01)

Patent

CA 1181203

ABSTRACT OF THE DISCLOSURE The invention relates to a composition for an opaque coating for minimizing the light output from selected areas of an incandescent lamp, particularly a halogen lamp. It has been discovered that a paste comprising a mixture of sodium silicate and manganese dioxide, when thinned with water to a desired consistency, then applied to the external surface of a halogen lamp bulb and properly dried, forms tightly adhering, opaque coating of dark gray color which resists flaking and blistering at operational temperatures of the halogen lamp.

413199

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